1995 GMC Sonoma Owner's Manual - Page 140

Here's how anti-lock works. Let's say the road is wet. You're driving safely. Suddenly an animal jumpsout in front of you. You slam on the brakes. Here's what happens with ABS. A computer sensesthat wheels are slowing down. With four-wheel anti-lock: If one of the wheels is about to stop rolling, the computer will separately work the brakes at each front wheel and at the rear wheels. The four-wheel anti-lock system can change the brake pressure faster than any driver could. With rear-wheel anti-lock: If one of the rear wheels is about to stop rolling, the computer will work the brakes at the rear wheels. The computer is programmed to make the most of available tire and road conditions. As you brake, your computer keeps receiving updates on wheel speed and controls braking pressure accordingly. Remember: Anti-lock doesn't change the time you need to get your foot up to the brake pedal. If you get too closeto the vehicle in front of you, you won't have time to apply your brakes if that vehicle suddenly slows or stops. Always leave enough room up ahead to stop, even though you have anti-lock brakes. 4-6